Dispensing Optician Lab Skills I

Overview

Course description

This course provides students with the laboratory skills for quality control of lenses and the ability to layout and prepare lenses for edging. Students will learn how to maintain the equipment and tools associated with the edging and finishing laboratory. It provides the student with skills to insert and mount lenses into various frame
materials and designs.

Course content

Introduction

course content and requirements
orientation of the equipment and tools
an overview of the edging process
introduction to industry standard charts
safety procedures in the laboratory

Spotting of Lenses

checking for optimal surface quality
use of the lensometer
power verification of single vision lenses
optical centre versus major reference point
single vision lenses with prism

Frames

frame parts, types & materials
frame measurements & markings
frame selection
frame alignment & adjustment
frame repairs
specialized frames
lens insertion
frame maintenance & cleaning

Centration of Single Vision Lenses

the mechanics of lens centration
horizontal and vertical centration
the boxing system
calculating lens blank sizes
industry standards formulas

Blocking of Lenses

the lens protractor
marking a single vision lens
double checking lens blank size
pupil distances and accuracy
blocking systems and their relationship to lens materials
deblocking lenses

Lens Shape Formation

pattern measurements and terminology
mounting and datum lines
pattern formation

Edging

the edging process
deviations from edger settings
lens chucking
bevel selection
verification with polariscope
variations in lens materials

Hand Edging

purpose of hand edging
developing the correct technique
correctional modifications
edge polishing

Lens Insertion and Mounting

frame materials
mounting design variations
hand tooling
heating and cooling
drilling and notching
grooving and nylor mounts
lens alignment
frame alignment
securing screws and pins
final verification

Identification of Lens Types, Materials and Coatings
Equipment Maintenance

basic equipment maintenance

Learning activities

Laboratory Lectures
Application / Calculation exercises in Laboratory
Independent Study of Courseware
Completion of Proficiency Tests
Completion of Laboratory Assignments
Online discussion forum

Means of assessment

The course evaluation is consistent with Douglas College evaluation policy. An evaluation schedule is presented at the beginning of the course.

Learning outcomes

Upon successful completion, the student will be able to:

spot check lenses for surface quality
verify the power of a single vision lens with the lensometer
mark the optical centre and major reference point of a single vision lens
calculate horizontal and vertical lens centration
calculate lens blank size requirements
equipment for dispensing eyeglasses including the lensometer, pupilometer, distometer, lens clock ruler and thickness callipers
perform the process of lens edging
edge polish lenses
perform lens insertion and mounting with various frame designs and materials
define ophthalmic terms pertaining to frame materials, designs, fitting and adjustments
perform frame fitting and adjustments

Textbook materials

A list of required and optional textbooks and materials is provided for students at the beginning of each semester.

Requisites

Prerequisites

No prerequisite courses.

Corequisites

DOPT 1100

Equivalencies

No equivalent courses.

Course Guidelines

Course Guidelines for previous years are viewable by selecting the version desired. If you took this course and do not see a listing for the starting semester / year of the course, consider the previous version as the applicable version.

September 2012 (Current)